<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>使用set实现数组去重</title>
</head>
<body>
    <script>
        let arr = [1,1,1,2,2,2,3,3,3,3,3,4,4,4,4,5,6,5,7,7];
        let s = [...new Set(arr)];
        let s2 = Array.from(new Set(arr));
        console.log(s,s2);
    </script>
</body>
</html>